Oh I think I finally groked what you suggested! Something like template <StringLiteral str> static constexpr Key<str> key in the class namespace - I think thi

Oh I think I finally groked what you suggested! Something like template <StringLiteral str> static constexpr Key<str> key in the class namespace - I think this this would work, but if I understand this correctly, You would need to do like User user {...}; user[User::key<"myKey">] Which actually is not so bad...